Backlit display for night use

Built-in rechargeable battery

Accessories available:

- Carry Case

- Mains Charger

- Car Charger

- PC Link Interface Cable

- PC Downloader Software

The BOWMONK AFM2 is a compact, portable electronic instrument for measuring and recording the maximum deceleration possible on an airport runway or road surface. The AFM2 is recognised worldwide and approved by leading civil aviation authorities, including the FAA, the Japanese Civil Aviation Bureau, the Romanian Civil Aeronautic Authority and Transport Canada.

The BOWMONK AFM2 is the modern day equivalent of a mechanical decelerometer such as the Bowmonk Brakemeter or Tapley Brake Meter.

It contains a solid state accelerometer and an accurate crystal controlled clock. During a friction test the accelerometer measures the deceleration (g-force) experienced by the transporting vehicle, 400 times per second with an accuracy of better than 2%. The output is read by a microprocessor and stored in the 128 Kb memory for automatic analysis at the end of the test.

In use the BOWMONK AFM2 is simply positioned on the passenger seat or in the footwell of the test vehicle - usually a good condition pick-up with balanced springing and good tyres. The vehicle does not need to come to a complete stop to calculate runway friction.

Control and setting of the BOWMONK AFM2 is via a seven button keypad which provides for airport, runway and operator identification.

The BOWMONK AFM2 is fitted with a two line alpha-numeric liquid crystal display. This is used to prompt the user for command entry via the keypad, to indicate results and to give any error messages. Night time operation is facilitated by back-lighting of the display panel.

The BOWMONK AFM2 contains a miniature dot matrix impact printer capable of printing text in 40 columns and graphics of 240 dots per line. Printout of results is obtained by pressing the Print button whilst viewing stored readings. The printout will show individual friction readings, averages for each third of the runway and a total average of all friction readings taken. The printout will not fade and duplicate copies can be taken automatically.

The BOWMONK AFM2 is powered by an internal rechargeable battery. When fully charged this will power the instrument for at least 12 hours testing and printing. The battery voltage and charge can be shown on the display.

*The AFM2 is ABS compatible, however please refer to your local aviation authority for advice on its use with ABS enabled vehicles. For example, the FAA allows portable electronic decelerometers like the AFM2 to be used with ABS-equipped vehicles (with no requirement to disable the ABS), as detailed in its Advisory Circular 150/5200-30D.

In other FAA news, in October 2016 changes were made to the process of assessing and reporting airport runway conditions. The FAA has confirmed that runway friction assessments should still be used, even though friction readings no longer need to be included with every Field Condition (FICON) report submitted to the NOTAM system. More information is available here (PDF).

Features & Specs

Features

Records true vehicle deceleration

Compatible with ABS braking systems

Stores up to 99 friction readings.

Provides hard copy printouts of up to 99 friction tests together with calculated total runway average or thirds.

Compensates for peaking due to initial vehicle pitching.

Indicates friction values 10% below average and disregards tests cancelled by operator or considered faulty.

Permits field programmable airport name, runway and operators through keypad or bar codes.

No mounting kit or connections to the vehicle are required

32 character high contrast alpha-numeric liquid crystal display with back lighting for night-time visibility.

Tactile switches, with beep, for selection purposes.

Automatic cancellation of faulty friction tests.

Manual cancellation of any test if required.

Provides for temporary suspension of friction testing with no loss of recorded data.

128 kilobyte CMOS memory with battery backup.

Built in 6 volt rechargeable battery (external voltage for battery recharge 9v to 18v DC), powers unit for at least 12 hours. Can be recharged from mains power pack or car cigarette lighter outlet.